In this work, a novel integration of a multi-effect distillation (MED) desalination plant driven by mechanical vapor compression and powered by a concentrated photovoltaic thermal system and an organic Rankine cycle is presented. The combined system is designed to produce fresh water at a capacity of 2500 m³/day. Three desalination configurations are studied, forward, backward and parallel cross feed. Mass, energy and exergy balances for different component of the desalination plant are elaborated and validated. The results showed that the specific electricity consumption of MED increased by 69 %, 68 % and 40 % by increasing the steam temperature from 80 to 100 °C, for the forward, backward and parallel cross feed configurations, respectively. The performance ratio decreased by 40 %, 21 % and 28 % by increasing the seawater salinity from 32,000 ppm to 47,000 ppm, for the forward, backward and parallel cross feed configurations, respectively. The results also showed that the solution for optimizing the energy consumption of the compressor by using staged compression equipped with intermediate cooling has enabled a saving of approximately 12 % in terms of electricity consumption. The levelized cost of water desalinated for optimized MED configurations ranged from 0.4 to 1.965 US$/m³. The overall results showed that the parallel cross-feed is the best configuration for desalination driven by a concentrated photovoltaic thermal system and an organic Rankine cycle. The performance of the current desalination unit has been improved compared to that of other MED technologies integrated with renewable energy sources.

在这项工作中，提出了一种由机械蒸汽压缩驱动并由集中光伏热系统和有机朗肯循环提供动力的多效蒸馏 (MED) 海水淡化厂的新型集成。联合系统的设计生产能力为 2500 m ^3的淡水/天。研究了三种脱盐配置，正向、反向和平行交叉进料。阐述并验证了海水淡化厂不同组件的质量、能量和火用平衡。结果表明，通过将蒸汽温度从 80 °C 提高到 100 °C，对于正向、反向和平行交叉进料配置，MED 的单位电耗分别增加了 69%、68% 和 40%。通过将海水盐度从 32,000 ppm 增加到 47,000 ppm，对于正向、反向和平行交叉进料配置，性能比分别降低了 40%、21% 和 28%。结果还表明，通过使用配备中间冷却的分级压缩来优化压缩机能耗的解决方案已使耗电量节省了约 12%。优化 MED 配置的淡化水平准化成本范围为 0.4 至 1.965 美元/立方米³ . 总体结果表明，并联交叉供水是集中光伏热系统和有机朗肯循环驱动的海水淡化的最佳配置。与其他与可再生能源相结合的 MED 技术相比，目前的海水淡化装置的性能有所提高。